SU57684A1 - Device for counting moving objects - Google Patents

Description

Devices are already known for counting objects moving in a certain direction, consisting of two photocells with amplifiers that serve to control the counter by means of electromagnetic relays.

According to the invention, in a similar device, for the purpose of effecting the counter only with a certain direction of movement of objects, an auxiliary relay is used, the contacts of which are included one in the counter circuit and the other in the aforementioned electromagnetic relays.

In FIG. 1 shows a schematic of the proposed device and FIG. 2- part of the scheme of the modified device.

As already indicated above, the device has an electromagnet counter C and kva of the photocell F and Fg with amplifiers U and, accordingly, the ultrasonic in whose outputs are included the relay PI

and P2.

Auxiliary relay RZ one of its contact / sz is included in the circuit of the meter, which also includes contacts A-I and relay PI and Pr, and the second contact k is connected parallel to contact k of relay P and in series with contact / Ca of relay P2.

Normally, the relays PI and Pr are energized and their contacts are closed, and the relay of the relay and counter C are in the off position. The contacts of the relays P and P disappear when the corresponding photocells are dim 1. with the object passing them. When moving objects past the photocells, both photocells are first illuminated, then the first is darkened in the direction of movement of the objects, then both photocells are darkened, then the first photocell is illuminated and, finally, both photocells are illuminated in the same sequence.

 can be seen from the diagram, when moving objects in the direction of the battery and darkening of the photocell F, the contact k of the relay P closes the relay relay circuit, which closes its contact A / C in the circuit of the C contact - and A – C are open. When both photocells darken, the relay Po will close, and the relay of the relay and PI will remain in the same position; the counter circuit C will now be open only at the contact of the relay P. At the next moment, when the first photocell F} is illuminated, the relay Ru is triggered, opens contact k and closes the contact / relay of the RZ relay remains in the operating position, receiving power through

contacts / Sz: And k, and the contact closes the meter pin. Further, the action is repeated; in the same sequence and produced by the account of objects.

Thus, when moving the objects in the direction of the AB, the counter is triggered once per cycle. When the objects move in the opposite direction to the BA arrow, the C-counter during iBce cycle time never works, since when the photocell nepjBoro is darkened, the second one is shunted and, therefore, its darkening cannot trigger the second relay.

In order to be able to count objects moving in the direction of BA, and not counting objects moving in the direction of AB, some change in the scheme is necessary. devices (fit. 2).

As can be seen from the diagram in FIG. 2, relay P | and PZ are equipped with additional k, ko contacts, the normal position of which should be opposite to the normal position of the corresponding contacts / cl and the switch used for switching the relay in this device version

The action of the circuit of FIG. 2 it is clear from the drawing and does not require additional explanations.

The subject matter of the invention.

Claims (2)

1. A device for counting objects moving IB in a certain direction, using two photo cells with amplifiers to control the counter using electromagnetic relays, characterized in that, to effect the counter only in a certain direction of the movement of objects, an auxiliary relay is used, one contact which is connected to the counter circuit, and the other is connected in parallel with the contact of one electromagnetic relay I in series with the contact of another electromagnetic relay. 2. The form is made of the device according to claim 1, IB of which, in order to obtain the selective action of the counter for one 3 of the two possible directions of movement of objects - forward and backward, a switch is used to switch the auxiliary relay.